| R&N | Renault and Nissan 
| Others |
| RN | Kirundi: A language of Niger and Congo
| Others |
| RN | Kurundi
| Others |
| RN | Nota Bene Xpl program
| Others |
| RN | Racy Nurse
| Others |
| RN | Radical Nephrectomy
| Others |
| RN | radionuclide
| Others |
| RN | Radius of Neptune
| Others |
| RN | Radon
| Element |
| RN | Rally Novice
| Others |
| RN | Random Number
| Others |
| RN | Randy Newman, singer and composer
| Others |
| RN | Randys Notation
| Others |
| RN | ranitidine
| Others |
| RN | Raptor Nurse
| Others |
| RN | Rattus Norvegicus
| Others |
| RN | Raving Num
| Others |
| RN | Raw Number
| Others |
| RN | Read News
| Others |
| RN | Real Network
| Others |
| RN | Real Nice
| Others |
| RN | Real Nimrod
| Others |
| RN | Real Nurse
| Others |
| RN | Real Nurses
| Others |
| RN | Real Nut
| Others |
| RN | Really Naughty
| Others |
| RN | Really Neurotic
| Others |
| RN | Really Nutty
| Others |
| RN | Rebound Nystagmus
| Others |
| RN | Record Number
| Others |
| RN | Recursive Normalization
| Others |
| RN | Red Neck
| Others |
| RN | Red Nucleus
| Others |
| RN | Reference Name
| Others |
| RN | Reference Noise
| Others |
| RN | Reflection Nebulosity
| Others |
| RN | Reflux Nephropathy
| Others |
| RN | Refreshments and Narcotics
| Others |
| RN | Regenerative Nodule
| Others |
| RN | Regestired Nurse
| Others |
| RN | Regional Number
| Others |
| RN | Registered Number
| Others |
| RN | Registered Numbers
| Others |
| RN | Registered Nut
| Others |
| RN | Rehabilitation Nurse
| Others |
| RN | Reject Nurses
| Others |
| RN | Release Notes
| Others |
| RN | Remarkable Nurses
| Others |
| RN | Render Node
| Others |
| RN | Renegade Nation
| Others |
| RN | Renumbering
| Others |
| RN | Renumbering N
| Others |
| RN | Repaired Northridge
| Others |
| RN | Rescue Ninja
| Others |
| RN | Resident Net
| Others |
| RN | Resident Nurse
| Others |
| RN | Residue Number
| Others |
| RN | Respect No
| Others |
| RN | Response Numerical
| Others |
| RN | Result Number
| Others |
| RN | Revenu National
| Others |
| RN | Reynolds Number
| Others |
| RN | Rheumatoid Nodule
| Others |
| RN | Rich Nurse
| Others |
| RN | Richard Nixon
| Others |
| RN | Right Now
| Others |
| RN | Rimini (Provence)
| Others |
| RN | Rio Negro
| Others |
| RN | River Network
| Others |
| RN | RNA Answers
| Others |
| RN | Rockstar Nurse
| Others |
| RN | Roman Numeral
| Others |
| RN | Room Number
| Others |
| RN | Round To Nearest
| Others |
| RN | Route Nationale
| Others |
| RN | Routing Number
| Others |
| RN | Royal Navy
| Others |
| RN | Rule Name
| Others |
| Rn. | Randnummer
| Others |